implement class and object(c++)

implement class and object

#include<iostream>
using namespace std;
class item
{
    int number;// private by default
    float cost;//privale by defaault
    public:
    void getdata(int a ,float b);  //prototype declaration to be defined
//............function defined in class..........
void putdata(void)
 {
     cout<<"number:"<< number<<"\n";
     cout<<"cost:"<<cost <<"\n";
 }
};
//............member function definetion >>..............
       void item::getdata(int a ,float b)//use membership label
{
    number =a;// private variable directly used
    cost=b;
}
//..............main program..............
    int main()
{
    item x;
    cout<<"\n object x "<<"\n";
    x.getdata(100,299.95); // call number function
    x.putdata(); // call number function
    item y; //create another object
    cout<<"\n object y "<<"\n";
    y.getdata(200 , 175.50);
    y.putdata();
    item z;
    cout<<"\n object z "<<"\n";
    z.getdata(800 , 1345.8);
    z.putdata();
    return 0;
}

output---